/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

async function* foo() {
    var i = 5;
    while (i > 2) {
        try {
          yield 7;
          print(i);
          i--;
          var j = 3
          while (j > 1) {
            try {
              yield 6;
              print(j);
              j--;
            } catch (e) {
                print(e);
            }
          }
        } catch (e) {
            print(e);
        } 
    }
  }
  let a = foo();
  a.next();
  a.next();
  a.next();
  a.next();